1. Install 3DSMAX2008
2. At the first launch, Select Activate the product
3. Run XF keygen and generate your Auth Code based on your Request Code
4. Choose as serial number : 666-20082008, 646-20082008, 653-12344321, 648-98766789, ..
5. Click on Enter an activation code and copy paste the one you got in the kg
6. Click Next, you are done
7. Run the Hotfix
8. Enjoy it